Improvement in steam vacuum-pumps



v (I. H. HALL. lmpmvement in Ste-am Vacuu m-Pumps. Patented Sep.24,1872.

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CHARLES H. HALL, OF NEW YORK, N. Y.

IMPROVEMENT IN STEAM VACUUM-PUMPS.

Specification forming part of Letters Patent No. 131,543, datedSeptember 24,1872.

OAsE 0 To all whom it may concern:

Be it known that I, CHARLES H. HALL, of New York city, in the State ofNew York, have invented a certain Improvement in Steam PumpingApparatus, of which the following is a specification: I

The invention relates to that class of pumping apparatus in which thesteam is admitted into the same chamber or chambers with the water, andpresses upon the surface thereof. The working parts are small relativelyto the capacity for pumping, and the apparatus constitutes an efficientpumping means, operating rapidly and reliably. I employ strong chambersprovided with valves for admitting water and holding it against itsreturn, and also with Valves for allowing it to be expelled throughanother pipe to be conducted to an elevated reservoir, or to such otherpoint as may be desired, and the operations of being filled with waterand being discharged succeed each other by reason of a change ofposition of the steam valve or valves, governing the admission of steamfrom a boiler or steam-generator, which may be situated at a distance.There are two equal chambers in each set of the apparatus, the twofilling and emptying alternately. The chamber which is filling withwater should complete its filling before its mate is emptied, and thechange of the steamwalves is effected automatically on the completion ofthe emptying of the discharging-chamber.

The following is a full and exact description of what I consider thebest means of carrying into effect one form of the invention. Theaccompanying drawing forms a part of this specification.

Figures 1 and 2 represent this form, in wh ich all the valves areconnected by levers and rods so as to open and close together. Themotion, either of the return water which has been expelled from achamber, or of the water inducted from the suction-pipe, orboth thesemotions,

are available to operate the steam valves. Fig. 1 is a central verticalsection, and Fig. 2 is a plan view.

The steam Valves e e gether bya rod, 0, and are also each connect= ed tolevers which swing in the interiors of the chambers. The lever F turnson the fixed pivot f and the lever I on the fixed pivot f The lower endof each lever is connected to a rod, 0, which carries the twowater-induction valves 0 0 At a higher level is connected the rod 12,which carries the waterdelivery valves 11 12 At the termination of theemptying of a chamber the partial vacuum formed when a volume of steamis discharged into the delivery-passage causes the shiitin g of thepositions of all the valves.

I have found by experiment that the loss of steam is slight when workedin this manner in nncoated vessels of metal; but I propose, in ordinarypractice, to coat the interior of each chamber with japan varnish, orwith red lead and oil, onwith a solution of rubber or the like, to serveas a durable non-conductor of heat. I can make the chambers and theseveral con nections of lead, to pump acids, or of glass or othermaterial for any special uses requiring such.

What I claim as my invention is as follows:

In combination with two chambers and suitable water induction andeduction means, and provisions for receiving steam intermittently intoeach, I claim the connection of all the valves together so that all becompelled to operate simultaneously and certainly, as herein specified.

In testimony whereof I have hereunto set my hand this 18th day of May,1872, in the presence of two subscribing witnesses.

V G. H. HALL.

Witnesses:

ARNOLD HoRMANN, W. G. DEY.

are connected to

